Slitter

ABSTRACT

Disclosed herein is a slitter. The slitter according to the exemplary embodiment of the present invention includes an unwinding part from which an insulating film is consecutively taken out; a plurality of transfer rollers that transfer the insulating film supplied from the unwinding part in one direction; a wheel knife that senses an air pocket formed on the insulating film taken out from the unwinding part to form fine holes on the insulating film; a cutter that is disposed between the transfer rollers and cuts, at a predetermined interval, the insulating film transferred in one direction through the transfer roller; and a winding part individually winding the insulating film divided at a predetermined interval by the cutter.

CROSS REFERENCE(S) TO RELATED APPLICATIONS

This application claims the benefit under 35 U.S.C. Section 119 of Korean Patent Application Serial No. 10-2011-0046256, entitled “Slitter” filed on May 17, 2011, which is hereby incorporated by reference in its entirety into this application.

BACKGROUND OF THE INVENTION

1. Technical Field

The present invention relates to a slitter capable of removing an air pocket on a surface of a film, and more particularly, to a slitter capable of removing an air pocket generated on a build-up film for implementing fine circuits on a substrate by wheel knives connected in parallel.

2. Description of the Related Art

Recently, as a demand for small-sized and multi-functional portable digital electronic products in addition to IT devices is increased, parts mounted in digital electronic products needs to be highly integrated for miniaturization and requires high specifications.

In particular, in a printed circuit board (PCB), an insulating film for build up in a multi-layered structure has been used so as to implement thinness and high integration for achieving high specification while implementing fine circuits.

The insulating film for build up coats a cover film on a carrier film by a coating device and the insulating film of which the front surface is coated is cut at an appropriate width by a slitter and is individually wound around a roll, which is then applied to the following process.

In this case, during the coating of the insulating film, a fine air pocket may occur between the carrier film and the cover film such that the fine air pocket grows to a relatively large air pocket while passing through a film transfer roller of the slitter, which has a negative effect on the surface of the insulating film.

Therefore, in a workplace, in order to remove the air pocket that is generated while passing through the roller, a predetermined portion of the cover film is cut by a cutter or a knife before passing through the roller so as to discharge the air in the air pocket to the outside while passing through the roller, thereby preventing the air pocket from being generated.

However, when a worker manually forms a cutting line on the insulating film transferred by the roller in the workplace, it may be difficult to accurately locate where to perform the cut. That is, the air pocket is sporadically generated on the insulating film, which may not be found and cut one by one, and as a result, the loss of the insulating film may occur.

In addition, even though the front of the air pocket generated on the insulating film is provided with a cutting line, the cutting line cannot help but be formed manually and thus, may be formed excessively. Therefore, air may be introduced through the cutting line while passing through the excessively formed cutting line, such that the air pocket may form a secondary wrinkle.

Further, since the formation of the cutting line by the worker may not control the cutting depth using the cutter or the knife, the cutting line may also cut into the carrier film rather than only cutting the cover film, such that the loss of the insulating film may be increased.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a slitter capable of minimizing a loss of a film capable of preventing an air pocket and a generation of a secondary air pocket in a wrinkle form by removing the air pocket generated on a build up film for implementing fine circuits on a substrate using wheel knives mounted in front of a roller in parallel.

According to an exemplary embodiment of the present invention, there is provided a slitter, including: an unwinding part from which an insulating film is consecutively taken out; a plurality of transfer rollers that transfer the insulating film supplied from the unwinding part in one direction; a wheel knife that senses an air pocket formed on the insulating film taken out from the unwinding part to form fine holes on the insulating film; a cutter that is disposed between the transfer rollers and cuts, at a predetermined interval, the insulating film transferred in one direction through the transfer roller; and a winding part individually winding the insulating film divided at a predetermined interval by the cutter.

The unwinding part may be provided to roll the insulating film and in the previous process, may take out the insulating film 101 in one direction in the state in which the cover film is covered on the carrier film.

In addition, in the slitter, a support roller may be further mounted between the plurality of transfer rollers and the cutter may be disposed on the support roller to cut the insulating film passing through the support roller.

Meanwhile, the plurality of transfer rollers may be divided into a first transfer roller and a second transfer roll, the insulating film taken out from the unwinding part may be transferred through the first transfer roller, and the insulating film cut the cutter passing through the support roller may be transferred to the winding part through the second transfer roller.

The wheel knife may be mounted in front of the first transfer roller and the slitter forming fine holes on the insulating film may further include a sensing unit that senses when the air pocket is present on the insulating film taken out from the unwinding part, a control unit that controls the driving of the wheel knife when the air pocket on the insulating film is sensed, and a driving unit that rotatably drives the wheel knife by a driving signal of the control unit.

In addition, the wheel knife may be disposed on a top surface of the insulating film at a predetermined interval and when the air pocket is sensed by the sensing unit, move to the top surface of the insulating film while being rotatably driven so that the cutter on an outer peripheral surface of the wheel knife contacts the top surface of the insulating film.

In this case, the wheel knife may rotate in the same direction as the taking out direction of the insulating film and may a plurality of fine holes on the insulating film on which the air pocket is sensed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a configuration diagram of a slitter according to an exemplary embodiment of the present invention.

FIG. 2 is a plan view of the slitter at the time of forming fine holes on an insulating film by the slitter according to the exemplary embodiment of the present invention.

FIG. 3 is a cross-sectional view of a wheel knife used for the slitter according to the exemplary embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The acting effects and technical configuration with respect to the objects of a slitter according to the present invention will be clearly understood by the following description in which exemplary embodiments of the present invention are described with reference to the accompanying drawings.

First, FIG. 1 is a configuration diagram of a slitter according to an exemplary embodiment of the present invention, FIG. 2 is a plan view of the slitter at the time of forming fine holes on an insulating part using the slitter according to the exemplary embodiment of the present invention, and FIG. 3 is a cross-sectional view of a wheel knife used for the slitter according to the exemplary embodiment of the present invention.

As shown, a slitter 100 according to an exemplary embodiment of the present invention may include an unwinding part 110 to which an insulating film 101 is supplied and a winding part 120 around which the insulating film 101 taken out from unwinding part 110 is individually wound by being cut at a predetermined interval by a cutter 130 while being transferred in one direction.

In addition, a plurality of transfer rollers 141 and 142 may be mounted between the unwinding part 110 and the winding part 120 to transfer the insulating film 101 taken out from the unwinding part 110 and a support roller 150 may be further provided between the plurality of transfer rollers 141 and 142 so as to change the transfer direction of the insulating film 101 and implement a smooth transfer of the insulating film 101 by being engaged with the transfer rollers 141 and 142.

In this configuration, a top of the support roller 140 may be provided with the rotating cutter 130. The cutter 130 may be closely attached to the support roller 150 to continuously cut the transferred insulating film 101 at a predetermined interval.

The plurality of cutters 130 may be coupled with the support 131 in parallel to cut the insulating film 101 transferred through the transfer rollers 141 and 142 so as to be divided at a predetermined interval and the number of cutters 130 may be appropriately adjusted according to a cutting interval of the insulating film 101.

The insulating film 101 cut by the cutter 130 is individually wound around the winding part 110 divided in plural while being transferred through the transfer rollers 141 and 142 and when the winding completes, may be released as the product after being packaged or may be introduced to the subsequent process of manufacturing a substrate.

Meanwhile, the unwinding part 120 may be provided to roll the insulating film 101. In the previous process, the unwinding part 120 takes out the insulating film 101 in one direction in the state in which the cover film is covered on the carrier film. In this case, the insulating film 101 may include an air pocket 102 having various sizes when the cover film is covered on the carrier film. The air pocket or the air wrinkle is formed passing through the first transfer roll 141 that is first disposed among the plurality of transfer rollers 141 and 142, such that the defects may occur.

Therefore, a wheel knife 160 is mounted in front of the first transfer roll 141 so as to remove the air pocket 102 on the surface of the insulating film 101 while passing through the first transfer roller 141.

The wheel knife 160 may be configured as a single cylindrical body or a plurality of disk bodies and an outer peripheral surface thereof may be provided with the plurality of cutters 161.

In addition, the wheel knife 160 may rotate in the same direction as the transfer direction of the insulating film 101 and rotate at the same speed as the transfer speed of the insulating film 101. The cutter 161 on the outer peripheral surface of the wheel knife 160 contacts the top surface of the insulating film 101 by the rotation of the wheel knife 160, such that fine holes 103 may be formed on the insulating film 101.

The top surface of the insulating film 101 on which the fine holes are formed is compressed while being transferred via the first transfer roller 141, such that the air filled in the air pocket 102 is discharged to the outside through the fine holes 103, thereby preventing the air pocket or the air wrinkle from being generated.

In this case, the wheel knives 160 are maintained on the top surface of the insulating film 101 in the state in which the wheel knives 160 are spaced apart from each other at a predetermined interval. When the air pocket 102 on the insulating film 101 taken out from the unwinding part 110 is sensed, as shown in FIG. 3, the cutter 130 on the outer peripheral surface of the wheel knife 160 may contact the insulating film 101 while the wheel knife 160 moves to the top surface of the insulating film 101.

The wheel knife 160 configured as described above may be driven only when the air pocket 102 formed on the insulating film 101 is sensed. Therefore, the slitter 100 on which the wheel knife 160 is mounted may further include a sensing unit 170 that senses the air pocket 102 formed on the insulating film 101, a driving unit 190 that rotatably drives the wheel knife 160, and a control unit 180 that controls the driving unit 190 by the sensed signal of the sensing unit 170.

When the insulating film 101 is supplied from the unwinding part 110, the air pocket 102 on the insulating film 101 is sensed by the sensing unit 170 mounted on the slitter 100 and the control unit 180 transmits the control signal to drive the wheel knife 160 in response to the sensed air pocket 102.

The control signal from the control unit 180 is applied to the driving unit 190, such that the wheel knife 160 is rotatably driven by the driving signal of the driving unit 190 according to the control of the control unit 180 and at the same time, the wheel knife 160 may move to the insulating film 101 by changing the position of the wheel knife 160.

By the slitter 100 configured as described above, the air pocket 102 formed on the insulating film 101 may be removed through the formed fine holes 103 while passing through the first transfer roller 141 by rotatably driving the wheel knife 160 before passing through the first transfer roller 141 of the transfer rollers 141 and 142. The wheel knife 160 may be selectively driven by the sensing unit 170, the control unit 180, and the driven unit 190 after sensing the air pocket 102.

In addition, the insulating film 101 from which the air pocket 102 is removed while passing through the first transfer roller 141 is cut at a predetermined interval by the cutter 130 mounted on the support roller 150 and the cut insulating film 101 is individually wound passing through the second transfer roller 142 so as to be released as products.

As set forth above, the slitter according to the exemplary embodiment of the present invention can form fine holes on the insulating film by the wheel knife to prevent the air pocket or the air wrinkle from being generated on the insulating film passing through the transfer roller.

In addition, the exemplary embodiment of the present invention can reduce the loss of the insulating film and manufacture the substrate with the insulating film from which the air pocket is removed, thereby improving the yield of the substrate product and improving the reliability of the product.

Although the exemplary embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Accordingly, such modifications, additions and substitutions should also be understood to fall within the scope of the present invention. 

1. A slitter, comprising: an unwinding part from which an insulating film is consecutively taken out; at least one transfer roller that transfers the insulating film supplied from the unwinding part in one direction; a wheel knife that senses an air pocket formed on the insulating film taken out from the unwinding part to form fine holes on the insulating film; a cutter that cuts, at a predetermined interval, the insulating film transferred in one direction through the transfer roller; and a winding part individually winding the insulating film divided at a predetermined interval by the cutter.
 2. The slitter according to claim 1, wherein the transfer roller includes a first transfer roller that transfers the insulating film taken out from the unwinding part and a second transfer roller that transfers the insulating film cut by the cutter.
 3. The slitter according to claim 2, further comprising a support roller that is located between the first transfer roller and the second transfer roller to transfer the insulating film while being engaged with the first transfer roller and the second transfer roller.
 4. The slitter according to claim 3, wherein the support roller has the cutter disposed on the top thereof, the cutter cutting the insulating film passing through the support roller.
 5. The slitter according to claim 1, wherein the wheel knife is mounted in front of the first transfer roller and rotates in the same direction as the taking out direction of the insulating film to form a plurality of fine holes on the insulating film.
 6. The slitter according to claim 1, further comprising: a sensing unit that senses when the air pocket is present on the insulating film taken out from the unwinding part, a control unit that controls the driving of the wheel knife when the air pocket on the insulating film is sensed, and a driving unit that rotatably drives the wheel knife by a driving signal of the control unit.
 7. The slitter according to claim 5, wherein the wheel knife is disposed on a top surface of the insulating film at a predetermined interval and when the air pocket is sensed by the sensing unit, moves to the top surface of the insulating film while being rotatably driven so that the cutter on an outer peripheral surface of the wheel knife contacts the top surface of the insulating film. 